County Maps US

Pettis County, Missouri

A county in Missouri, ranked 25 of 115 by population.

CountyFIPS 29159

Within Missouri
Pettis County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Sedalia, the county seat, located via the 2025 Census Gazetteer.

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Population
44,254
+1,243 (+2.9%) since 2020
Land area
682.2
square miles. A further 0.6% of the total area is water
Population density
64.9
people per square mile, computed rather than published
County seat
Sedalia
Seat of county government.
Established
1833
192 years ago
Largest city
Sedalia city
Population 22,621.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Pettis County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Pettis County, Missouri from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 676 by 800 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Pettis County ranks

Position among the 115 counties of Missouri, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn MissouriNationally
Population44,25425th of 1151,117th of 3,144
Land area682.2 sq mi32nd of 1151,373rd of 3,144
Population density64.9 per sq mi30th of 1151,245th of 3,144
Median household income$60,43057th of 1152,048th of 3,143

Full data for Pettis County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population44,254Vintage 2025 Population Estimates
Population in 202043,011Vintage 2025 Population Estimates
2020 estimates base?42,987Vintage 2025 Population Estimates
Land area682.2 sq mi2025 Gazetteer Files
Water area4.0 sq mi2025 Gazetteer Files
Total area686.3 sq mi2025 Gazetteer Files
Population density?64.9 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$60,430American Community Survey 2020-2024 5-Year Estimates
Median home value$166,300American Community Survey 2020-2024 5-Year Estimates
Median age38.2American Community Survey 2020-2024 5-Year Estimates
Households16,996American Community Survey 2020-2024 5-Year Estimates
Housing units18,673American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
+116
607 births, 491 deaths
Net migration
+244
More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 7 areas bordering Pettis County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Johnson CountyMissouri26 mi56,670
Benton CountyMissouri26 mi20,536
Saline CountyMissouri24 mi23,265
Cooper CountyMissouri16 mi17,136
Morgan CountyMissouri11 mi22,418
Henry CountyMissouri3.0 mi22,671
Lafayette CountyMissouri1.0 mi33,531

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 115 counties of Missouri

Open the interactive Missouri county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.